Sprinkler head



SPRINKLER HEAD Filed Feb. 7, 1928 March 4, 1930. H. CARLSON a. z a J 2 B W m 7 2 g 7 J J the parts of the leverage system will be less type of sprinkler head in which water is dis- Patented Mar. 4, 1930 UNITED STATES PATENT OFFICE HJ'ALMAR G. CARLSON, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO ROCKWOOD -SPRINKLER'COMPANY OF MASSACHUSETTS, OF WORCESTER, MASSACHUSETTS, A

CORPORATION OF MASSACHUSETTS SPRINKLER HEAD Application filed February 7, 1928.

This invention relates to a well known type of sprinkler head for fire sprinkling systems in which the cap that seals the end of the sprinkler is kept closed by a leverage system involving a fusible link.

The principal object of this invention is to provide the members of this leverage system in such improved forms that when the fusible link is separated by the melting of the solder,

liable to be caught and held by the distributor.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which Fig. 1 is a side view of a sprinkler head constructed in accordance with this invention and shown as mounted in pendant position;

Fig. 2 is a View of the same at right angles to Fig. 1 as indicated by the arrow 2 in that figure;

Fig. 3 is a view on enlarged scale showing a condition of the parts when the fusible metal melts and the water starts to flow;

Fig. 4 is a perspective view of the lever of the leverage system, and

Fig. 5 is a sectional view of the same on the longitudinal line 55 of Fig. 4.

The invention is shown as applied to that charged through an opened nozzle 16 when the sprinkler goes 0E. The end of th1s nozzle is normally sealed by a cap 11 with a packing, or whatever is necessary to prevent leakage. The leverage system to hold the cap in position to seal the open end of the nozzle consists of a lever 12, a strut 13 and a fusible link 14. The lever 12, as usual, is provided with a depression 15 for receiving an adjustable screw plug 17 and another depression 18 for receiving the end of the strut 13. At the other end it is provided with a groove 19 for receiving the end of the fusible link 14. The

.other end of this link engages under a shoulder 20 on the strut 13. The strut is provided with a notch 21 for receiving the end of the cap 11, all in the usual way.

By this construction, a strong leverage is secured when the parts are mounted to hold the cap in position and the screw plug 17 is Serial No. 252,596.

screwed up to put sufiicient pressure on the cap to prevent leakage. The link 14 is made up of two parts, united together by a fusible metal or solder 23, as usual. 1

The fusible metal 23 of the link 14 is provided with a rounded projection 24. The strut 13 is provided with integral rounded projections 25 on both sides and the lever 12 is provided with a projection 26 on one side. In the, latter case this projection 26 is formed by shaping the link and leaving a depression 27 on the back, but that is not an essential feature.

These projections 24, 25 and 26 are providedfor the purpose of preventing any of these parts from being caught by the distributor 37 when the fusible link is melted and the water is allowed to flow. By inspection of Fig. 3 it will be seen that without the projection 26 the lever 12 might have its lower end caught in the projecting flange of the distributor '27 and rest against the surface 28 above it, in which case the stream of water coming down from the nozzle 10 would be divided when it struck the upper edge of this lever and would be apt to hold it in that position so that the lever would remain in this position perhaps until the water was shut off. Also the other parts, particularly the strut 13, are apt to be caught in a similar way by the distributor 27 and be prevented from dropping out when the water starts to flow.

By the construction shown, the projection 26 necessarily engages the rigid wall 28 of the center of the distributor, as indicated in Fig. 3 and the lever 12 itself is forced outwardly away from the edge of the distributor. If, however, this lower edge is caught there, the presence of this projection 26 puts the lever in such position that the water flowing out of the nozzle 10 would strike its upper side and tend to swing the lever about the surface of the projection 26 and its lower end upwardly, thus forcing it out of the device. Likewise, if the strut 13 falls down on either side of the distributor and engages its flange, one of the projections 25 thereon willhave a similar effect upon it. This necessitates the discharge of all the elements immediately after the water starts to flow, if

they do not fall out by the breaking of the leverage system.

When the sprinkler is mounted the other side up so that the Water flows upwardly, these projections also assist in preventing the catching of the various elements in the frame of the sprinkler head and the clearing of the device of these parts'so that the Water will flow in an uninterrupted stream against the distributor and will be thrown out in all directions in the manner intended in the original design.

Although I have illustrated and described only one form of the invention I am 'aWare of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention 7 as expressed in the claims.

Therefore, I do not wish to be limited in these respects, but what I do claim is 1. In a leverage system for a sprinkler head,

the combination with a lever, a strut and a fusible link connected together to form a triangle to hold the system in place, normally preventing the flow of water, the said lever and strut of the leverage system having projections thereon arranged and positioned to engage a stationary part of the sprinkler head and force the lever and strut to assume a position at a considerable distance from the axis of the sprinkler head, for assisting in discharging them when the leverage system is broken by the melting of the fusible link.

' 2. In a sprinkler head, the combination 7 with an open-ended nozzle having a frame secured thereto, a cap for closing the open end of the nozzle, an adjusting screw opposite the cap, and a distributor around the adjusting screw having an inwardly extending flange, of a leverage system between the adjusting screw and'the cap including a strut having its surfaces rounded and projecting from the body thereofto prevent the strut from lying close to the frame of the sprinkler head when the leverage system collapses.

3. In a sprinkler head, the combination with an open-ended nozzle, a cap, a frame, and a distributor at the end of the frame having an inwardly extending flange, of a leverage system for holding the cap closed comprising a lever having a projection on the side toward the frame to engage the frame and tend to prevent the outer end of the lever from becoming caught in the distributor and necessitating its being located in nearly vertical position if caught so as to be easily discharged by the stream of water flowing against it.

4. In a leverage system for a sprinkler head, the combination with a lever normally arranged in substantially horizontal position and having a projection on the side adjacent to the side of theframe of the sprinkler head shaped to prevent its being caught in said 7 frame'and a strut and fusible link associated therewith for holding the sprinkler head I In testimony whereof I have hereunto saf fixed my signature.

HJALMAR G. oA'RL'soN. 

